CN104415951B - Steam turbine for nuclear power station adjusts Oil System Flushing method - Google Patents
Steam turbine for nuclear power station adjusts Oil System Flushing method Download PDFInfo
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- CN104415951B CN104415951B CN201310381328.8A CN201310381328A CN104415951B CN 104415951 B CN104415951 B CN 104415951B CN 201310381328 A CN201310381328 A CN 201310381328A CN 104415951 B CN104415951 B CN 104415951B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/04—Apparatus for cleaning or pickling metallic material for cleaning pipes
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- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Organic Chemistry (AREA)
- Cleaning By Liquid Or Steam (AREA)
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Abstract
The invention provides a kind of steam turbine for nuclear power station to adjust Oil System Flushing method, comprises the steps：Preparation before flushing：Stoppage in transit and isolation including system and equipment, the preparation of instrument and material；Rinse the installation of short circuit equipment：The installation of short circuit equipment is removed and rinsed including field apparatus, each in-line and return line is formed primary Ioops；Forward and reverse flushing：Water-soluble washing agent will be full of in pipeline, wash cycles are carried out respectively along its forward and reverse to above-mentioned loop；Slow rinse：Circulation flushing is carried out to loop with water and oil respectively.The present invention makes each in-line of steam turbine adjusting oil system all connect to form primary Ioops with return line due to the flushing short circuit equipment using external big flow, and developing result is particularly evident, and washing time greatly shortens.In addition, cleaning after be respectively adopted water circulation and oil displacement circulation flushing is carried out again to above-mentioned loop, simplify replacing process, save cost, further increase Steam Turbine operational efficiency.
Description
Technical field
The present invention relates to million kilowatt nuclear power station key technology area, more particularly to steam turbine for nuclear power station regulation oil system
Purging method.
Background technology
At present, steam turbine for nuclear power station group include steam turbine adjusting oil system (GFR), steam turbine control system (GRE) and
Protection System of Turbin (GSE).The function of steam turbine adjusting oil system (GFR) is to steam turbine control system (GRE) and steamer
Machine protection system (GSE) provides the treated fire-resistant power oil with qualified quality and operational factor.Specifically, be exactly to
The high and low cylinder pressure stop valve of steam turbine, regulating valve operating mechanism provide temperature be 43 deg. C Pressures be 13.8 megabars, flow it is small
Same fire-resistance oil.
With the continuous development of economy, power demand is increasing in industrial production, improves the efficiency of unit by increasingly
Pay attention to, the performance of steam turbine adjusting oil system (GFR systems) is also improved constantly, and steam turbine adjusting oil system is driven to admission valve
Motivation structure and emergency trip valve supply power oil and conservation oil (after urgent Valve control device comes out), thus to the quality of working solution
It is it is required that very high.Working solution is also to have the functions such as lubrication, cooling, sealing, antirust concurrently so as to the medium for transmitting energy in GFR systems.
Fluid power medium in existing GFR systems uses the anti-flaming liquid fire-resistance oil of fire resisting, and its pressure for vaporization is low, without inflammable and
The catabolite of burning is maintained, and is not handed on the torch along oil stream, or even will not also be drawn after the gas burning being made up of catabolite
Whole liquid is played to catch fire.With good lubricity, security, flame retardancy and low volatility.
GFR systems need have flow, pressure, temperature in meeting steam turbine hydraulic equipment under stable state and transient operation operating mode to liquid
The requirement of degree and other specification, the system is closed circulation system.
Steam turbine regulation oil system is designed to provide one by quenched and overanxious fire-retardant with constant temperature and pressure
Hydraulic fluid, its flow then change with the demand of system.There are two conveying series in fueller, each self energy is provided into vapour
The power oil of valve and the protection oil of emergency tripping device, so as to provide the means for making admission valve thread off.
In order to prevent cooling water pollution regulation oil, cooling water system design is into making the pressure of water in heat exchanger less than regulation
The pressure of oil.
At present, adjusting oil system includes special fuel tank, pump, cooler and oil tune processor.Oil adjusts processing unit,
Provided with oil tank and oil transfer pump, so that oil is discharged and returned from main fuel tank.
The hold-up vessel of regulation oil includes oil tank and operating oil tank (main fuel tank).Add in main fuel tank built with immersion electricity
Hot device, to raise the temperature of oil before cold start.Wherein the size of oil tank and main fuel tank are equal.
Steam turbine regulation oil system is provided with two sets of same conveying series.Wherein two fuel tanks are designed with silica gel respirator, but
It is sealing to air that other positions of system, which are,.When fuel transfer pressure is remarkably decreased, device can be automatically from the series of operation
It is switched to standby series.Remote-operated controller is additionally provided with main control room KSC, for starting and stopping booster pump and high pressure
Pump.
Steam turbine regulation oil system also includes distribution duct and the filter of admission valve operating mechanism and No. 1 bearing block.
With the increase that unit operation circulates, fire-resistance oil understands degradation and decomposition simultaneously in the presence of various composite factors
It is deposited on GFR systems fuel feeding and oil returning tube.Physics, which rinses, can not thoroughly remove these deposits.It is thoroughly clear at deposit end
Fresh oil is changed in the case of reason, the aging of fresh oil can be accelerated, more deposits, 3 microns of system are produced within the shorter time
Main filter screen (GFR112/212FI) pollutant holding capability it is limited, therefore main filter screen frequent jams of GFR systems recent years.It is therefore, it is necessary to fixed
Phase carries out strict cleaning to GFR systems, so that equipment plays its due effect.
Existing overhaul GFR cycle chemistries rinse and use U.S. B＆s company technique schemes, and the program uses the main oil of system
Pump, to run fire resistant oil as medium, adds oleyl amine (adding proportion about 1.5%) thereto, and each pipeline is carried out at 55-60 DEG C
Circulation flushing, two pipelines are rinsed every time, rinse ten circulations altogether.Filter net jam is had no in flushing process, also has no a large amount of
Impurity is rinsed.But after ten circulations are rinsed, open low-pressure oil return pipe inspection and find still have largely in oil returning tube
Black impurity.It is caused by oil return underfill pipeline that B＆S companies, which think, is changing pipeline connected mode, is improving back pressure
To 1.5Bar, after examination is rinsed 2 hours, open and check that discovery is not rinsed well still.
Therefore, it is necessary to a kind of technological means is provided to solve drawbacks described above.
The content of the invention
It is an object of the invention to overcome the defect of prior art, there is provided a kind of steam turbine for nuclear power station regulation oil system rushes
Washing method, it is intended to solve to adjust the defects of developing result of oil system is poor, and washing time is grown, and cost is high in the prior art.
A kind of steam turbine for nuclear power station regulation Oil System Flushing method provided by the invention, comprises the steps：
Preparation before S1 flushings：Stoppage in transit and isolation including system and equipment, the preparation of instrument and material；
S2 rinses the installation of short circuit equipment：The installation of short circuit equipment is removed and rinsed including field apparatus, makes each in-line
Primary Ioops are formed with return line；
The forward and reverse flushings of S3：Water-soluble washing agent will be full of in pipeline, above-mentioned loop is entered respectively along its forward and reverse
Row wash cycles；
S4 slow rinses：Circulation flushing is carried out to above-mentioned loop with water and oil respectively.
Using the above method of the present invention, due to the flushing short circuit equipment using external big flow, and make Steam Turhine Adjustment
Each in-line of oil system all connects to form primary Ioops with return line, and its developing result is particularly evident, does not flush originally
Place and impurity all be rinsed out.Relative to U.S. B＆s company technique schemes, its developing cost substantially reduces, only
For 1/7th of U.S. B＆s company technique schemes, washing time greatly shortens.Meanwhile using water-soluble washing agent, pass through mould
Intend contrast test, its cleaning performance and oleyl amine are suitable, and the cleaning agent temperature control is convenient, low toxicity, and corrosivity is small.In addition, this
Water circulation is respectively adopted after invention Chemical cleaning and oily substitute mode carries out circulation flushing again to above-mentioned loop, not only simplify and put
Technique is changed, saves cost, and can make unit normal operation input quickly after cleaning, and then improves Steam Turbine operation effect
Rate.
Brief description of the drawings
Fig. 1 is the flow chart of cleaning step of the present invention；
Fig. 2 steam turbine adjusting oil system flushing pipe connection diagrams of the present invention；
Fig. 3 is the external pump group of the present invention and external interim fuel tank schematic diagram；
Fig. 4 is that steam turbine adjusting oil system of the present invention rinses short circuit flow chart；
Fig. 5 is fire resistant oil analytical table during present invention displacement；
The external pump group valves of Fig. 6 illustrate table.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Applicant has found in steam turbine adjusting oil system maintenance is rinsed, and in the prior art, adjusts the oil inlet pipe of oil system
Because pressure ratio is higher when road is rinsed, washer is easy to flow back during flushing, so rinse it is general relatively cleaner, and return line by
Low in pressure, developing result is bad, has remained many dirty, impurity, but also can remain a part of irrigation, influences unit
Operation, so some maintenance will not be rinsed to return line, so to certain pollution is brought on pipeline, these pollute
Reaction can be produced with the oxide in fire resistant oil, cause the dangerous of system.The present invention is directed to existing backwashing manner developing result
The defects of bad, has carried out a series of improvement.Accompanying drawing illustrates the embodiment of the present patent application, attached for ease of description
Figure is only shown and the application relevant portion.
Referring to Fig. 1, a kind of steam turbine for nuclear power station regulation Oil System Flushing method provided by the invention, comprise the steps：
Preparation before S1 flushings：The stoppage in transit and isolation of system and equipment, the preparation of instrument and material；
S2 rinses the installation of short circuit equipment：The installation of short circuit equipment is removed and rinsed including field apparatus, makes the steam turbine
Regulation each in-line of oil system all connects with return line, and forms primary Ioops；
The forward and reverse flushings of S3：Water-soluble washing agent will be full of in pipeline, above-mentioned loop is entered respectively along its forward and reverse
Row wash cycles；
S4 slow rinses：Circulation flushing is carried out to above-mentioned loop with water and oil respectively.
In above-mentioned steps, by removing equipment component, short circuit equipment is rinsed in separately installation, makes the steam turbine adjusting oil system
Unite each in-line and return line all connects, so that whole system and forming complete loop, while will be filled in pipeline
Full water-soluble washing agent, wash cycles are carried out to above-mentioned loop respectively along its forward and reverse, so can completely, thoroughly, not
The each pipeline of cleaning of omission, the impurity on each corner and dirty, can preferably ensure that the effect of cleaning；Further respectively
Cyclic permutation flushing is carried out to above-mentioned loop with water and oil, can effectively remove the residual of cleaning agent, ensures fluid in system operation
Indices provide strong guarantee in allowed limits, for the safe and reliable operation of Steam Turbine.
Above-mentioned steps are specific as follows：
Preliminary step before S1 is rinsed specifically includes：
Steam-turbine unit is stopped transport, vapour system is isolated, oil system is electric, the isolation of liquid, fire resistant oil emptying, while need to be prepared
Instrument, instrument, spare part and material for being needed in flushing process etc., including some nipples, seal washer etc., for facing external
When fuel tank, external pump group and system connect.
In order to ensure being smoothed out, it is necessary to remove the equipment component of GFR systems of flushing process, such as pipeline, valve, with
Continued access enters to rinse short circuit equipment after an action of the bowels.Meanwhile nipple, closure plate and blocking cap are installed in the place for removing pipeline or valve, make institute
Each in-line of steam turbine adjusting oil system is stated all to connect to form primary Ioops with return line.Fig. 2, Fig. 4 show the present invention
GFR system flush short circuit flow charts and connection diagram, wherein P are power oil pipeline, and S is protection oil pipe line, and R is oil return pipe
Road, D are drain line.
S2 rinses short circuit equipment installation steps and specifically included：
S21 field apparatus is removed, including following content：
Remove high-pressure main throttle valve and timing steam gate drive mechanism connected pipes (power oil pipe, protection oil pipe, oil return pipe and storage
Energy device pipe) etc.；
Remove low pressure timing steam gate blast pipe, protection oil connecting pipe, power oil connecting pipe and servomotor leakage oil pipe；
Disconnect and protect oily oil inlet pipe, oil return connecting tube bleeder valve end；
Remove low pressure main inlet throttle-stop valve drive mechanism drain pipeline, blast pipe；
Disconnect protection oil oil inlet pipe, oil return pipe and the power oil pipe on low pressure main inlet throttle-stop valve drive mechanism isolation drain valve；
Remove emergency overspeed governor (ETV) connected pipes, such as power oil oil inlet pipe, oil return pipe, protection oil pipe；
Remove high-low pressure oil return house steward and connect short circuit；
Remove the isolating valve manifold block of steam turbine regulating system servomotor；
Remove separated exhaust valve of Turbine protection system etc.；
Disconnection Turbine protection system GSE002AR enters, oil return connecting tube.
The installation of S21 short circuit communicating pipes, closure plate and blocking cap include following content：
High-pressure main throttle valve nipple is installed, low pressure main inlet throttle-stop valve nipple is installed, high voltage adjusting porthole nipple, installation are installed
Low pressure timing steam gate protection oil arrives oil return nipple, installs 047-052AQ nipples, installs low pressure main inlet throttle-stop valve nipple, installation
Emergency overspeed governor (ETV) power oil is to oil return nipple.
In oil return pipe connection bleeder valve end installation closure plate, oil return pipe closure plate is installed, manifold block spiral case closure plate is installed；Install back
Oil pipe reveals oily interface blocking cap；
Turbine protection system GSE002AR short connecting hoses are installed；Emergency overspeed governor (ETV) is installed and protects oil pipe to external pump
Connection flexible pipe, installation high and low pressure oil return house steward to external pump connection flexible pipe, installation power oil, the oily house steward of protection connect to external pump
Connect flexible pipe；
External pump group, external interim fuel tank and its subsidiary pipeline are installed, which is provided with can connect the in-line and institute
State the interface of return line.
From the closed circuit cooling water valve GST901VN connections nuclear island demineralized water of Generator Stator Cooling water system (GST) conventional island
Distribution system (SED) cooling water, displacement water tube hose.
Fig. 2 and Fig. 3 provides the present invention and rinses the external pump group of short circuit equipment and external interim fuel tank schematic diagram, including each pipe
Road, external pump group A row pump and B row pump and external interim fuel tank 1, external pump group A row pump and B row pump and interim fuel tank YLAccording to figure
2nd, Fig. 3 modes connect, and make pump group pump group A row pump and B row pump and interim fuel tank YLBetween have two suction lines and two oil return pipes,
Wherein interim fuel tank YLOil inlet B0, oil-out A0, positive flushing oil return opening B6 and back flush oil return opening A6 are provided with, wherein
Oil inlet B0 connects B row pumps, and oil-out A0 connects A row pumps, forms two suction lines, and controlled respectively by isolating valve A1-A5 and B1-B5
System, also there is 4 nipples, including high pressure oil return house steward H (HP Drain), low pressure oil return house steward L (LP between pump group and system
Drain) and power oil house steward P (Power Inlet), the oily house steward S (Safety Inlet) of protection, two return lines are formed,
Above-mentioned each oil pipe connection steam turbine adjusting oil controlling bus G (GFR pipelines).Interim fuel tank YLOn back flush oil return opening A6 with
The upper interface connections of isolating valve A4, can connect with power oil house steward P, connect reverse oil return flushing line；Forward direction rinses oil return opening
B6 is connected with the upper interfaces of isolating valve B1, can be connected and be connect with high pressure oil return house steward H, connect positive oil return flushing line.So, lead to
Cross interim fuel tank YL, forward and reverse flushing of whole GFR systems can be formed.
It should be noted that as described above, in series pump, A row pump, B row pump can use simultaneously, respectively as positive and negative
Its function is realized to the passage of flushing, also can individually be undertaken using B row pump and each valve as with spare unit by A row pump and each valve,
When realizing forward and reverse flushing, interim fuel tank Y can be changed at any timeLOil inlet B0, control valve connects in oil-out A0 and A row pumps
Mouth can be completed.So, when running into blocking or other emergencies, replaceable A row pump completes forward and reverse pre-washing function.
Further, interim fuel tank YLThe supply source and circulation canal during oil flushing are can be used as, and is alternatively arranged as
Supply source (water tank) and circulation canal when water of the present invention rinses, and fuel tank are used alternatingly, and complete the flushing process of water circulation.
For ease of understanding the implication of each valve in figure, Fig. 6 is referred to, and understand incorporated by reference to the Fig. 6 and subsequently carry out positive and negative punching
The state of valve when washing.
The forward and reverse rinsing steps of S3 use following chemical flush mode：
S31 adds cleaning agent：
Disclosed pump with inserting and be pumped into from MX16 rice in interim fuel tank, because cleaning agent volatility is stronger, live excitant taste
It is dense, to strengthen divulging information.Simultaneously because cleaning agent corrosivity is also relatively strong, pumping, which finishes, to be needed to clean to insert in time to disclose pump and pipeline.
Interim tank drainback side screen is changed before adding cleaning agent, ventilation effect can be improved.
Cleaning agent uses MOL-308 fire-resistance oil cleaning agents, is produced by Science and Technology Ltd. of Shenzhen mole, MOL-
308 main component is amino alcohol, APEO and bleeding agent, belongs to neutral Environment-friendlywater-soluble water-soluble cleaning agent, metal is stale-proof
Erosion, it is easy to operate, and any halogenic ingredient is free of, without amines, safety and environmental protection.(rolled suitable for electric power, petrochemical industry, steel
Steel) and other business systems using phosphate ester fire-resistant oil, due to high temperature and hydrolysis generation material cleaning and other heavy oil
Dirty obstinate oil stain cleaning.
After adding cleaning agent, all short connecting hose isolating valves are opened, pump group flow control valve are slowly turned down, until pump discharge
Pressure is 5bar.Circulation about 1 hour, connects exhaust hose at 6 spiral case closure plate pressure measuring tie-ins respectively, sees if there is cleaning fluid company
Afterflow goes out, and illustrates that whole system has been completely filled with cleaning agent if having.
S32 pipelines soak：
Add after cleaning agent, play pump, recycled back, make whole pipe full cleaning agent, close pump group and be connected with system
Valve, termination of pumping, soak 20-24 hours.Specially after pipe full cleaning agent, first close and suck-A removed in external pump group,
All valves beyond Suck-B.Then stoppage in transit A row pump, suck-A, suck-B are closed.
S33 circulation flushings：
After immersion, interim tank drainback side screen is first changed, plays pump.Then according to positive according to above-mentioned loop high-voltage
Rinse 1 hour, low pressure it is positive rinse 1 hour, high pressure back flush 1 hour, the order of low pressure back flush 1 hour rushed
Wash.
To prevent that it is too high that machine from sealing temperature, during circulation flushing, switchable pump simultaneously when flushing pipe switches per hour.Switching finishes
Interim tank temperature, current of electric, outlet pressure are recorded afterwards.
In the order described above, 7 circulations are rinsed altogether.Terminate in second circulation and the 5th circulation terminates, open No. 7
The smear test of door oil return pipe finds to rinse substantially in net.Terminate in second circulation, the 5th circulation and the 6th circulation terminate
Interim tank drainback side screen is changed respectively.
, it is necessary to exclude cleaning agent after chemical flush, cleaning agent is extracted into 0 meter with plug in pump of disclosing, loads wasted oil bucket, takes out altogether
Go out 11 to disclose.Cleaning agent excludes to finish, and clears up fuel tank, it is found that inner wall of oil tank has many filemot colloid substances.Show chemical punching
It is effective to wash, and has developed the material that original purging method is not flushed to.
Certainly, the number of circulation flushing can be determined as needed, can be detected in flushing process, if rinsing
Through qualified, then subsequent rinse can dispense.
Further, in specific embodiment of the present invention, before the S3 steps, in addition to leakage detection step：
After each Pipe installing, external interim fuel tank is first filled into water, the valve being then shut off in all short circuit lines, risen
Pump, valve opening carries out leakage detection one by one, if there is exception, eliminates anomaly and carries out follow-up forward and reverse flushing work again.
S4 slow rinse steps：
Slow rinse is carried out to steam turbine regulation oil system including water and oil is respectively adopted.It is specific as follows：
S41 water slow rinse steps：
Interim fuel tank is full of water, to system flush half an hour, draining, there are many foams to occur.Fuel tank water is drained only,
Water is filled with again, a pump is played and system is circulated, and holding is intake always, while opens fuel tank top closure plate, allows fuel tank toward excessive
Stream.Replacement process, GGR systems (steam-turbine lubrication, apical axis and cranking system) sump oil drain valve is kept to be constantly in opening,
And someone guards, while SHE systems (waste oil and on-radiation water discharge system) interim immersible pump of melt pit needs batch (-type) to start.
Preferably, rotation starts two pumps, and carries out forward and reverse alternately flushing, and all pipelines are all flushed into no foam
Occur, then rush half an hour more.
Water is replaced, and the water in fuel tank is drained only, clears up fuel tank, while by interim pipeline, external pump group, accumulator
Water in nipple all drains only.
Water replacement process can be carried out repeatedly.
Further, water displacement can use following open type to replace：
Water in external fuel tank is emptied, clears up fuel tank；
SED (nuclear island desalination water distribution system) water is added into fuel tank, full of whole fuel tank；
The outside draining of pump is disclosed using inserting, while the closed circuit cooling water valve of regulator generator Stator Condense Water System conventional island comes
Water-carrying capacity, ensure that oil tank liquid level is constant；
Pump group is placed in A and arranges positive flushing state, standard-sized sheet recycle valve, confirms each isolating valve A1-A5 and B1- of short circuit
B5 is completely in open mode.Start B row pumps, open high-pressure side (Isolator-HP) and low-pressure side (Isolator-LP), adjust
Recycle valve is saved, pump discharge pressure is reached 5Bar, carries out positive flushing.After 30 minutes, termination of pumping.Start A row pumps, open low pressure
Side (Isolator-LP) is according to upper carry out back flush.Then positive flushing, the circulation of back flush are carried out once again.
In flushing process, the parameter of flushing, the result that sampling observation is rinsed can be recorded as needed.
S42 oil slow rinse steps：
Oil is imported into external interim fuel tank by external oil filter, pump is played, according to the order of forward and reverse flushing to height
Low pressure pipeline enters line replacement.It is preferred that being sampled 1 time at interval of 1 hour, replace 6 hours altogether.
It is described in detail below：
S421 first times oily slow rinse：
Water in external fuel tank is emptied, clears up fuel tank.
Displacement cleaning oil is imported into external fuel tank by external oil filter.External oil filter is connected, fire resistant oil is carried out
Continuous filtering (except particle and moisture)；Pump group is placed in A and arranges positive flushing state, standard-sized sheet recycle valve, confirm short circuit every
Open mode is completely in from valve.
Start A row pumps, open high-pressure side (Isolator-HP) and low-pressure side (Isolator-LP), adjust recycle valve,
Pump discharge pressure is reached 5Bar, parameters are recorded.
After 30 minutes, termination of pumping, pump group is placed in A row back flush states.Start A row pumps, open high-pressure side
(Isolator-HP) recycle valve and low-pressure side (Isolator-LP), is adjusted, makes to pump out day pressure and reaches 5Bar, record is every
Parameter.
After 30 minutes, sampling, granularity chemical examination is carried out, result of laboratory test is recorded, while be placed in 200 times of electric microscopes and see
Examine, by observation result record.After sampling, termination of pumping.
Repeated forward is rinsed 30 minutes, and back flush 30 minutes a, circulation finishes, sample examination, until granularity goes out
Existing flex point, termination of pumping, opens all valves of pump group.
The visible Fig. 5 of its result.
Second of oily slow rinse of S422：
Oil in external fuel tank is emptied, clears up fuel tank.
Old oil in DIGFR001/002BA is discharged into external interim fuel tank by external oil filter.
Connect external oil filter, continuously filtering is carried out to fire resistant oil (except particle and moisture)
Pump group is placed in A and arranges positive flushing state, standard-sized sheet recycle valve, confirms that short circuit isolating valve is completely in opening
State.Start A row pumps, open high-pressure side (Isolator-HP) and low-pressure side (Isolator-LP), adjust recycle valve, make pump
Outlet pressure reaches 5Bar, records parameters.
After 30 minutes, termination of pumping, pump group is placed in A row back flush states.Start A row pumps, open high-pressure side
(Isolator-HP) recycle valve and low-pressure side (Isolator-LP), is adjusted, pump discharge pressure is reached 5Bar, record is every
Parameter.
After in 30 points, sampling, granularity chemical examination is carried out, result of laboratory test is recorded, while be placed in 200 times of electron microscopes
Observation, by observation result record, after sampling, termination of pumping.
Repeated forward is rinsed 30 minutes, back flush 30 minutes, sample examination, until flex point occurs in granularity, termination of pumping, is beaten
All valves of turn on pump group.
, it is necessary to recover GFR original states after the completion of above-mentioned flushing process, ensure Steam Turbine normal operating condition, therefore
Remove external pump group and external interim fuel tank.Therefore, in the specific implementation process of the present invention, in the S4 slow rinses step
Also include afterwards：
S5 rinses short circuit equipment Removal and in-situ FTIR spectroelectrochemitry step：
Each short circuit communicating pipe, closure plate and blocking cap are removed, changes seal, returns charge of oil pipe.Particular content is as follows：
High-pressure main throttle valve and timing steam gate short connecting hose are removed, changes seal, returns charge of oil pipe.
043-046AQ is returned and is attached to position, dismantles oil return pipe blocking cap, changes seal, returns charge of oil pipe.
Low pressure timing steam gate short connecting hose is removed, drain pipeline blocking cap, oil return pipe closure plate, changes seal, returns charge of oil pipe.
Manifold block spiral case closure plate is removed, removable spacer plate, changes space bar upper-lower seal part, with the dress GRE005- that drives a vehicle back
010 manifold block.
Low pressure accumulator short connecting hose is removed, notices that Residual oil can not be drained, it is necessary to which refuse bag connects oil.With cucurbit by accumulator
In place, seal is changed, returns charge of oil pipe.
Remove low pressure main inlet throttle-stop valve driving short connecting hose, drain pipeline blocking cap, oil return pipe closure plate.If drive mechanism is integrally torn open
Remove, then return dress drive mechanism：If only having removed isolation drain valve, seal is changed, dress isolation drain valve is returned using special hanger.
Conduit seals are changed, return charge of oil pipe.
Remove emergency overspeed governor (ETV) short connecting hose, drain pipeline blocking cap, oil return pipe closure plate.
GSE002AR short connecting hoses are removed, change seal, return charge of oil pipe.
External pump group and subsidiary pipeline are removed, changes high-low pressure oil return house steward's pad, returns charge of oil pipe.
Seal is changed, returns dress power oil fuel feeding main pipe.
The foregoing is only preferred embodiments of the present invention, its structure is not limited to the above-mentioned shape enumerated, it is all
All any modification, equivalent and improvement made within the spirit and principles in the present invention etc., it should be included in the protection of the present invention
Within the scope of.
Claims (14)
1. a kind of steam turbine for nuclear power station adjusts Oil System Flushing method, it is characterised in that comprises the steps：
Preparation before S1 flushings：Stoppage in transit and isolation including system and equipment, the preparation of instrument and material；
S2 rinses the installation of short circuit equipment：The installation of short circuit equipment is removed and rinsed including field apparatus, is made each in-line and is returned
Oil pipe line forms primary Ioops；
The forward and reverse flushings of S3：Water-soluble washing agent will be full of in pipeline, above-mentioned loop is followed respectively along its forward and reverse
Ring cleans；
S4 slow rinses：Circulation flushing is carried out to above-mentioned loop with water and oil respectively；
Wherein, before the S3 steps, in addition to：
Leakage detection step：After each Pipe installing, external interim fuel tank is first filled into water, the valve closed in all short circuit lines,
Pump is played, valve opening carries out leakage detection one by one, if there is exception, eliminates anomaly and carries out follow-up work again；
The S4 slow rinses include：
S41 water slow rinses：External interim fuel tank is full of water,, will after foam occurs to draining after system flush half an hour
Fuel tank water is drained only, is filled with water again, plays pump and system is circulated, and holding is intake always, while opens fuel tank top closure plate,
Allow fuel tank overflow outward；
S42 oil slow rinses：Oil is imported into interim fuel tank by external oil filter, pump is played, according to the suitable of forward and reverse flushing
Ordered pair high-low pressure pipeline is replaced.
2. steam turbine for nuclear power station as claimed in claim 1 adjusts Oil System Flushing method, it is characterised in that the S1 steps tool
Body includes：Unit outage, vapour system isolation, oil system it is electro-hydraulic isolation and fuel oil emptying field apparatus dismounting and instrument and
The preparation of material.
3. steam turbine for nuclear power station as claimed in claim 1 adjusts Oil System Flushing method, it is characterised in that the S2 steps tool
Body includes：Place installation nipple, closure plate and the blocking cap of pipeline or valve are being removed, the steam turbine adjusting oil system is respectively entered
Oil pipe line all connects with return line, and forms primary Ioops.
4. steam turbine for nuclear power station as claimed in claim 3 adjusts Oil System Flushing method, it is characterised in that the S2 steps tool
Body includes：
S21 field apparatus is removed：
Remove high-pressure main throttle valve and timing steam gate drive mechanism connected pipes；
Remove low pressure timing steam gate blast pipe, protection oil connecting pipe, power oil connecting pipe, servomotor leakage oil pipe；
Disconnect and protect oily oil inlet pipe, oil return connecting tube bleeder valve end；
Remove low pressure main inlet throttle-stop valve drive mechanism drain pipeline, blast pipe；Disconnect on low pressure main inlet throttle-stop valve drive mechanism isolation drain valve
Protection oil oil inlet pipe, oil return pipe, power oil pipe；
Remove emergency overspeed governor connected pipes；
Remove high-low pressure oil return house steward and connect short circuit；
Remove the isolating valve manifold block of steam turbine regulating system servomotor；
Remove the separated exhaust valve of Turbine protection system；
Disconnection Protection System of Turbin enters, oil return connecting tube；
The installation of S22 short circuit communicating pipes, closure plate and blocking cap；
High-pressure main throttle valve nipple is installed, low pressure main inlet throttle-stop valve nipple is installed, high voltage adjusting porthole nipple is installed, low pressure is installed
Timing steam gate protection oil arrives oil return nipple, installation emergency overspeed governor power oil to oil return nipple；
In oil return pipe connection bleeder valve end installation closure plate, oil return pipe closure plate is installed, manifold block spiral case closure plate is installed；Oil return pipe is installed
Reveal oily interface blocking cap；
Protection System of Turbin short connecting hose is installed；Installing ETV protects oil pipe to install high and low pushes back to external pump connection flexible pipe
Oily house steward installation power oil, protects oily house steward to external pump connection flexible pipe to external pump connection flexible pipe；
External pump group, external interim fuel tank and its subsidiary pipeline are installed, which is provided with can connect the in-line and described time
The interface of oil pipe line.
5. the steam turbine for nuclear power station regulation Oil System Flushing method as described in claim any one of 1-4, it is characterised in that：In institute
State in S3 steps, after irrigation is full of pipeline, first carries out immersion treatment, then carry out circulation flushing several times.
6. steam turbine for nuclear power station as claimed in claim 5 adjusts Oil System Flushing method, it is characterised in that：The S3 steps tool
Body includes：
S31 adds cleaning agent：Pump is disclosed by the external interim fuel tank of cleaning agent feeding setting with inserting；
S32 pipelines soak：Make whole pipe full cleaning agent, close the valve that pump group is connected with system, termination of pumping, soak 20-24
Hour；
S33 circulation flushings：After immersion, play pump, by high pressure it is positive rinse 1 hour, low pressure it is positive rinse 1 hour, high pressure it is anti-
To rinse 1 hour, the order of low pressure back flush 1 hour be rinsed, switchable pump simultaneously when flushing pipe switches per hour.
7. steam turbine for nuclear power station as claimed in claim 6 adjusts Oil System Flushing method, it is characterised in that：The S32 steps
In：Add after cleaning agent, first play pump, recycled back, then make whole pipe full cleaning agent.
8. steam turbine for nuclear power station as claimed in claim 6 adjusts Oil System Flushing method, it is characterised in that：The S33 steps
In：After immersion, external tank drainback side screen is first changed, recur pump.
9. the steam turbine for nuclear power station regulation Oil System Flushing method as described in claim 6 or 8, it is characterised in that：The S33 steps
In rapid：During circulation flushing, per hour flushing pipe switch when simultaneously switchable pump.
10. steam turbine for nuclear power station as claimed in claim 1 adjusts Oil System Flushing method, it is characterised in that：The S41 water is put
Change in rinsing step, rotation starts two pumps, and carries out forward and reverse alternately flushing, all occurs to all pipelines without foam
When, then half an hour is rinsed, after water is replaced, the water in fuel tank is drained only, clear up fuel tank, while by interim pipeline, external
Water in pump group, accumulator nipple all drains only.
11. the steam turbine for nuclear power station regulation Oil System Flushing method as described in claim 1 or 10, it is characterised in that：The S41
The displacement of water slow rinse step water uses following open type substitute modes：
Water in external fuel tank is emptied, clears up fuel tank,
Nuclear island desalination water distribution system water is added into fuel tank,
The outside draining of pump is disclosed using inserting, while the closed circuit cooling water valve of regulator generator Stator Condense Water System conventional island carrys out current
Amount, ensure that oil tank liquid level is constant；
Pump group is placed in positive flushing state, standard-sized sheet recycle valve, confirms that short circuit isolating valve is completely in open mode, opens
Dynamic pump, makes pump discharge pressure reach 5Bar, carries out positive flushing；After 30 minutes, termination of pumping, according to upper carry out back flush；Then again
Carry out once positive flushing, the circulation of back flush.
12. steam turbine for nuclear power station as claimed in claim 1 adjusts Oil System Flushing method, it is characterised in that：The S42 oil is put
Change in rinsing step：Sampled 1 time at interval of 1 hour, replace 6 hours altogether.
13. the steam turbine for nuclear power station regulation Oil System Flushing method as described in claim 1 or 12, it is characterised in that：The S42
Oily slow rinse step includes：
S421 oil displacements for the first time：Water in interim fuel tank is emptied, clears up fuel tank；
Displacement cleaning oil is imported into external fuel tank by external oil filter, and fire resistant oil is continuously filtered；
Pump group is placed in positive flushing state, confirms that short circuit isolating valve is completely in open mode；
Start pump, pump discharge pressure is reached 5Bar；
After 30 minutes, termination of pumping, pump group is placed in back flush state, pump discharge pressure is reached 5Bar；
After 30 minutes, sampling, granularity chemical examination, after sampling, termination of pumping are carried out；
Repeated forward is rinsed 30 minutes, and back flush 30 minutes a, circulation finishes, sample examination, until granularity turns
Point, termination of pumping, open all valves of pump group；
Second of oil displacement of S422：
Oil in interim fuel tank is emptied, clears up fuel tank；
Old oil in system is discharged into interim fuel tank by external oil filter；
Fire resistant oil is continuously filtered,
Pump group is placed in positive flushing state, confirms that short circuit isolating valve is completely in open mode, starts pump, make pump discharge
Pressure reaches 5Bar；
After 30 minutes, termination of pumping, pump group is placed in back flush state, starts pump, pump discharge pressure is reached 5Bar；
After 30 minutes, sampling, granularity chemical examination, after sampling, termination of pumping are carried out；
Repeated forward is rinsed 30 minutes, back flush 30 minutes, sample examination, until flex point occurs in granularity, termination of pumping, opens pump
All valves of group.
14. the steam turbine for nuclear power station regulation Oil System Flushing method as described in claim any one of 1-4, it is characterised in that：Institute
State S4 slow rinses step also includes afterwards：
S5 rinses short circuit equipment Removal and in-situ FTIR spectroelectrochemitry：Each short circuit communicating pipe, closure plate and blocking cap are removed, changes seal, returns dress
Oil pipe.
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| CN104841676B (en) * | 2015-05-21 | 2017-05-31 | 中国能源建设集团安徽电力建设第一工程有限公司 | A kind of turbo-engine lube switches rinse-system and its purging method |
| CN105268684A (en) * | 2015-11-06 | 2016-01-27 | 綦江齿轮达亨科技开发公司 | Gearbox cleaning system with oil filter plate |
| CN106194289B (en) * | 2016-09-23 | 2017-12-26 | 岭东核电有限公司 | A kind of Steam Turhine Adjustment device and its application process |
| CN108277092B (en) * | 2017-01-05 | 2020-10-27 | 鞍钢股份有限公司 | Cleaning agent for cleaning water cooler and water cooling system and use method thereof |
| CN109424373B (en) * | 2017-08-23 | 2022-03-22 | 广东核电合营有限公司 | Application method of fire resistant oil in steam turbine regulating oil system |
| CN108543778B (en) * | 2018-07-06 | 2020-06-26 | 三门核电有限公司 | Pipeline flushing method and tool |
| CN109513695B (en) * | 2018-12-27 | 2023-10-20 | 江苏核电有限公司 | Dissolving type chlorinated pipeline dredging device and dredging method |
| CN111420946A (en) * | 2020-03-31 | 2020-07-17 | 广船国际有限公司 | Series washing method of fuel system |
| CN111473185B (en) * | 2020-04-25 | 2021-08-20 | 重庆三联管道设备有限公司 | Cleaning method of process pipeline |
| CN112160803B (en) * | 2020-10-20 | 2022-12-09 | 中广核核电运营有限公司 | Method for flushing regulating oil system of steam turbine of nuclear power station |
| CN114570715B (en) * | 2022-01-19 | 2023-05-30 | 岭澳核电有限公司 | Flushing device and method for hydraulic oil system of steam turbine of nuclear power station |
| CN115007573A (en) * | 2022-06-07 | 2022-09-06 | 仇什 | Soaking type cleaning process for water pipeline |
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